:root {
	--button-radius: 0.7rem;
	font-size: 16px;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}

body {
	align-items: center;
	background-color: white;
	background: url(../images/background.jpg);
	/* -webkit-filter: blur(4px); */
	/* filter: blur(4px); */
	background-attachment: fixed;
	background-position: center;
	background-repeat: no-repeat;
	background-size: cover;
	display: grid;
	height: 100vh;
	place-items: center;
}

.bg {
	content: "";
	width: 100%;
	height: 100%;
	position: absolute;
	left: 0;
	top: 0;
	background: inherit;
	filter: blur(4px);
	z-index: 1;
}

.form__title {
	font-weight: 300;
	margin: 0;
	margin-bottom: 1.25rem;
}

.link {
	color: gray;
	font-size: 0.9rem;
	margin: 1.5rem 0;
	text-decoration: none;
}

/* 主体DIV样式 */

.container {
	/* background-color: #485A6B; */
	border-radius: var(--button-radius);
	box-shadow: 0 0.9rem 1.7rem rgba(0, 4, 36, 0), 0 0.7rem 0.7rem rgba(0, 0, 0, 0);
	/* box-shadow: 10px 10px 5px rgba(0, 0, 0, 0), 10px 10px 5px rgba(0, 0, 0, 0); */
	height: 500px;
	max-width: 800px;
	overflow: hidden;
	position: relative;
	width: 100%;
}

.container__form {
	height: 100%;
	position: absolute;
	top: 0;
	transition: all 0.6s ease-in-out;
}

.container--signup {
	left: 0;
	width: 50%;
	z-index: 2;
}

.container.right-panel-active .container--signup {
	transform: translateX(100%);
}

.container--signin {
	left: 0;
	opacity: 0;
	width: 50%;
	z-index: 1;
}

.container.right-panel-active .container--signin {
	animation: show 0.6s;
	opacity: 1;
	transform: translateX(100%);
	z-index: 5;
}

/* 叠加部分样式 */

.container__overlay {
	height: 100%;
	left: 50%;
	overflow: hidden;
	position: absolute;
	top: 0;
	transition: transform 0.6s ease-in-out;
	width: 50%;
	z-index: 100;
}

.container.right-panel-active .container__overlay {
	transform: translateX(-100%);
}

.overlay {
	background-color: lightblue;
	background: url(../images/background.jpg);
	background-attachment: fixed;
	background-position: center;
	background-repeat: no-repeat;
	background-size: cover;
	height: 100%;
	left: -100%;
	position: relative;
	transform: translateX(0);
	transition: transform 0.6s ease-in-out;
	width: 200%;
}

.container.right-panel-active .overlay {
	transform: translateX(50%);
}

.overlay__panel {
	align-items: center;
	display: flex;
	flex-direction: column;
	height: 100%;
	justify-content: center;
	position: absolute;
	text-align: center;
	top: 0;
	transform: translateX(0);
	transition: transform 0.6s ease-in-out;
	width: 50%;
}

.overlay--left {
	transform: translateX(-20%);
}

.container.right-panel-active .overlay--left {
	transform: translateX(0);
}

.overlay--right {
	right: 0;
	transform: translateX(0);
}

.container.right-panel-active .overlay--right {
	transform: translateX(20%);
}

/* 按钮设置 */

.btn {
	background-color: burlywood;
	background-image: linear-gradient(45deg, #485A6B 0%, lightblue 50%, #485A6B );
	border-radius: 15px;
	border: 1px solid gray;
	color: white;
	cursor: pointer;
	font-size: 0.8rem;
	font-weight: bold;
	letter-spacing: 0.1rem;
	padding: 0.9rem 4rem;
	text-transform: uppercase;
	transition: transform 80ms ease-in;
}

.form>.btn {
	margin-top: 1.5rem;
}

.btn:active {
	transform: scale(0.95);
}

.btn:focus {
	outline: none;
}

/* 表单样式 */

.form {
	background-color: white;
	display: flex;
	align-items: center;
	justify-content: center;
	flex-direction: column;
	padding: 0 3rem;
	height: 100%;
	text-align: center;
}

.input {
	background-color: white;
	border: none;
	padding: 0.9rem 0.9rem;
	margin: 0.5rem 0;
	width: 100%;
}

@keyframes show {
	0%, 49.99% {
		opacity: 0;
		z-index: 1;
	}
	50%, 100% {
		opacity: 1;
		z-index: 5;
	}
}